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Brian Uribe3,488 Points
Am I understanding this correctly? I'm trying to establish an absolute URL
import Foundation let treehouseCourseID = 25 let treehouseBaseURL = NSURL(string: "https://api.teamtreehouse.com/") let courseURL = NSURL(string: "\(treehouseCourseID)", relativeToURL: treehouseBaseURL)
This was a bit tricky ... on the first challenge the treehouseBaseURL = https://api.teamtreehouse.com/ However on the second challenge the path to treehouse courses is shown to include the string; "course/" which must be added to the let courseURL constant. So what we need is; courseURL = treehouseBaseURL + "course/" + treehouseCourseID The code you have instead is; courseURL = treehouseBaseURL + TreehouseCourseID Try the following code: let courseURL = NSURL(string: "course/ (treehouseCourseID)", relativeToURL: treehouseBaseURL) Hope this helps